Kinda looks like a 1970's acid flashback while scrutinizing the Sears Tower.

__________________The modern conservative is engaged in one of man's oldest exercises in moral philosophy; that is, the search for a superior moral justification for selfishness. John Kenneth GalbraithWe must always take sides. Neutrality helps the oppressor, never the victim. Silence encourages the tormentor, never the tormented. Sometimes we must interfere.Elie Wiesel

I like the concept, but I'm not sure they can make it work. The individual towers seem very small when you consider the size of the elevator banks that would be needed to get to the top floors. It would not leave much floor space to lease and might not work economically.